Mathematics Class 7
Operations with Integers
Adding, taking away, multiplying and sharing integers, on a line and with tokens.
19 lessons · ~122 min total
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Lessons in this topic
- 0 Start here A roadmap: add, take away, multiply and share, with a line and with tokens. · 4 min You are here
- 1 Two moves the same way Adding two numbers below zero walks left both times, and the moves stack. · 5 min
- 2 A move each way One move out and one move back — the bigger move decides the side you land on. · 7 min
- 3 Taking away, another way round A take-away is the same walk as adding the opposite number. · 6 min
- 4 Two dashes on one line Taking away a number below zero turns the walk around — it goes right. · 7 min
- 5 Without the line A short routine gets an add or a take-away right in your head. · 6 min
- 6 Checkpoint: adding and taking away A graded check on the first five ideas. · 5 min
- 7 The same move, counted again Multiplying by a whole number repeats one move — left stays left. · 6 min
- 8 Past the end of the times table The gap between rows in a times table stays the same — even past zero. · 8 min
- 9 Sharing it out Division undoes multiplying, so it follows the same sign rule. · 7 min
- 10 What zero does Zero does a different job in each operation — and it cannot answer one of them. · 7 min
- 11 Where we use them A change between two readings is a signed number — later reading take away earlier. · 7 min
- 12 Checkpoint: multiplying, sharing and zero A graded check on multiplying, sharing, and what zero can and cannot do. · 5 min
- 13 Zero pairs Zero pairs let you take away tokens that are not there. · 7 min
- 14 The additive inverse Add a number to its additive inverse and you reach zero. · 6 min
- 15 Many numbers, one sign Count the negative factors to know the sign of a long product. · 7 min
- 16 A number times a bracket A number times a bracket is that number times each part. · 7 min
- 17 The big picture Fourteen ideas, tied back together. · 5 min
- 18 Track quiz Cheat-sheet table plus a reveal quiz — one question per idea. · 10 min
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